1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/arch/arm/mach-footbridge/cats-pci.c
 4 *
 5 * PCI bios-type initialisation for PCI machines
 6 *
 7 * Bits taken from various places.
 8 */
 9#include <linux/kernel.h>
10#include <linux/pci.h>
11#include <linux/init.h>
12
13#include <asm/irq.h>
14#include <asm/mach/pci.h>
15#include <asm/mach-types.h>
16
17/* cats host-specific stuff */
18static int irqmap_cats[] = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
19
20static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
21{
22	return 0;
23}
24
25static int cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
26{
27	if (dev->irq >= 255)
28		return -1;	/* not a valid interrupt. */
29
30	if (dev->irq >= 128)
31		return dev->irq & 0x1f;
32
33	if (dev->irq >= 1 && dev->irq <= 4)
34		return irqmap_cats[dev->irq - 1];
35
36	if (dev->irq != 0)
37		printk("PCI: device %02x:%02x has unknown irq line %x\n",
38		       dev->bus->number, dev->devfn, dev->irq);
39
40	return -1;
41}
42
43/*
44 * why not the standard PCI swizzle?  does this prevent 4-port tulip
45 * cards being used (ie, pci-pci bridge based cards)?
46 */
47static struct hw_pci cats_pci __initdata = {
48	.swizzle		= cats_no_swizzle,
49	.map_irq		= cats_map_irq,
50	.nr_controllers		= 1,
51	.ops			= &dc21285_ops,
52	.setup			= dc21285_setup,
53	.preinit		= dc21285_preinit,
54	.postinit		= dc21285_postinit,
55};
56
57static int __init cats_pci_init(void)
58{
59	if (machine_is_cats())
60		pci_common_init(&cats_pci);
61	return 0;
62}
63
64subsys_initcall(cats_pci_init);

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/arch/arm/mach-footbridge/cats-pci.c
 4 *
 5 * PCI bios-type initialisation for PCI machines
 6 *
 7 * Bits taken from various places.
 8 */
 9#include <linux/kernel.h>
10#include <linux/pci.h>
11#include <linux/init.h>
12
13#include <asm/irq.h>
14#include <asm/mach/pci.h>
15#include <asm/mach-types.h>
16
17/* cats host-specific stuff */
18static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
19
20static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
21{
22	return 0;
23}
24
25static int __init cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
26{
27	if (dev->irq >= 255)
28		return -1;	/* not a valid interrupt. */
29
30	if (dev->irq >= 128)
31		return dev->irq & 0x1f;
32
33	if (dev->irq >= 1 && dev->irq <= 4)
34		return irqmap_cats[dev->irq - 1];
35
36	if (dev->irq != 0)
37		printk("PCI: device %02x:%02x has unknown irq line %x\n",
38		       dev->bus->number, dev->devfn, dev->irq);
39
40	return -1;
41}
42
43/*
44 * why not the standard PCI swizzle?  does this prevent 4-port tulip
45 * cards being used (ie, pci-pci bridge based cards)?
46 */
47static struct hw_pci cats_pci __initdata = {
48	.swizzle		= cats_no_swizzle,
49	.map_irq		= cats_map_irq,
50	.nr_controllers		= 1,
51	.ops			= &dc21285_ops,
52	.setup			= dc21285_setup,
53	.preinit		= dc21285_preinit,
54	.postinit		= dc21285_postinit,
55};
56
57static int __init cats_pci_init(void)
58{
59	if (machine_is_cats())
60		pci_common_init(&cats_pci);
61	return 0;
62}
63
64subsys_initcall(cats_pci_init);